FREQUENCY-TUNABLE PHASE INVERTER BASED ON SLOT-LINE RESONATOR | Zendy

ZhenHeng Liao | Zendy; Xuchun Zhang | Zendy

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FREQUENCY-TUNABLE PHASE INVERTER BASED ON SLOT-LINE RESONATOR

Author(s) -

ZhenHeng Liao,

Xuchun Zhang

Publication year - 2017

Publication title -

progress in electromagnetics research letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.245

H-Index - 33

ISSN - 1937-6480

DOI - 10.2528/pierl16110403

Subject(s) - inverter , resonator , line (geometry) , optoelectronics , phase (matter) , electronic engineering , electrical engineering , materials science , physics , engineering , mathematics , voltage , geometry , quantum mechanics

This paper describes a frequency-tunable phase inverter based on a slot-line resonator for the first time. The control circuit is designed and located on the defected ground. None of dc block capacitors are needed in the microstrip line. A wide tuning frequency range is accomplished by the use of the slot-line resonator with two varactors and a single control voltage. A 180-degree phase inverter is achieved by means of reversing electric field with two metallic via holes connecting the microstrip and ground plane. The graphic method is used to estimate the operation frequency. For verification, a frequency-tunable phase inverter is fabricated and measured. The measured results show a wide tuning frequency range from 1.1 GHz to 1.75 GHz with better than 20-dB return loss. The measured results are in good agreement with the simulated ones.

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